Yes. You can code your entire UI with your preferred .NET language.
No. Instead of providing a drag and drop designer, the Avalonia IDE extensions support a live previewer, which will render a preview of the UI, refreshing as your modify the XAML.
Yes. You can compile for macOS and Linux from Windows. You'll likely need to package your app on those platforms to create release packages of your app.
Yes. You can develop for Android today and we have a preview demonstrating the beginnings of iOS support. You should however give careful consideration to each platform and ensure that your app behaves well on smaller, touch focused devices.
- Debian 9 (Stretch)+
- Ubuntu 16.04+
- Fedora 30+
- macOS High Sierra 10.13+